| Complete Diesel Engine Repair

What We Do

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• Advanced Engine Diagnostics

Our technicians use professional heavy-duty diagnostic equipment and OEM-level software to accurately diagnose check engine lights, fault codes, performance problems, derates, no-start conditions, and other engine concerns. We diagnose the problem before replacing parts, helping eliminate unnecessary repairs and getting to the root cause of the failure.

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• Complete Diesel Engine Repair

From minor engine repairs to major internal engine work, Lexington Diesel provides complete heavy-duty diesel engine repair. We service cylinder heads, head gaskets, camshafts, rocker assemblies, injectors, fuel systems, oil systems, cooling systems, turbochargers, exhaust components, seals, gaskets, and other internal and external engine components.

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• Fuel System & Injector Repair

We diagnose and repair high-pressure common rail and other heavy-duty diesel fuel systems. Services include injector testing and replacement, fuel pump diagnosis and replacement, fuel pressure concerns, fuel leaks, contaminated fuel systems, fuel lines, filters, and related components.

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• Turbocharger & Air Management Systems

Loss of power, excessive smoke, boost problems, and engine performance issues can often be traced to the air management system. We diagnose and repair turbochargers, charge-air coolers, intake systems, boost leaks, exhaust manifolds, EGR components, sensors, actuators, and related piping.

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• Cooling & Lubrication Systems

Proper cooling and lubrication are critical to diesel engine life. We repair coolant leaks, overheating concerns, radiators, water pumps, thermostats, oil leaks, oil coolers, oil pressure problems, hoses, reservoirs, and other cooling and lubrication system components.

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• Internal Engine & Major Repairs

When an engine requires more extensive work, we have the capability to perform major mechanical repairs. Our technicians can diagnose internal failures and perform repairs involving cylinder heads, valve trains, pistons, liners, bearings, camshafts, timing components, and other internal engine systems.

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• Aftertreatment & Emissions Diagnostics

Modern diesel engine performance is directly connected to the emissions system. We diagnose and repair DPF, DOC, SCR, DEF, EGR, NOx sensor, temperature sensor, dosing, and regeneration-related problems. We perform forced regenerations, system testing, fault tracing, and component replacement when necessary.

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• Engine Performance & Drivability Problems

If your truck is experiencing low power, excessive smoke, rough running, poor fuel economy, hard starting, abnormal engine noise, excessive oil consumption, overheating, or repeated fault codes, we can perform a complete diagnostic evaluation to determine the cause and recommend the proper repair.

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Complete Heavy-Duty Engine Service

At Lexington Diesel, we handle everything from routine engine concerns to complex diagnostic and major mechanical repairs. Our shop works with a wide range of heavy-duty diesel engines and uses professional diagnostic software, testing procedures, and repair equipment to accurately identify failures.

Whether your truck has a check engine light, an active derate, a coolant leak, a failed turbo, an injector problem, an aftertreatment fault, or a major internal engine failure, our goal is to diagnose it correctly, repair it properly, and get your truck back to work.

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